Preheat oven to 350 degrees. In a medium bowl, mix together flour, oats, baking soda and salt.In a large bowl, beat butter until soft. Add brown sugar and cream together until light and fluffy. Add egg whites and egg, one at a time, completely incorporating the first before adding the next. Add vanilla, scrape down sides of bowl and mix well.

Add dry ingredients and mix until incorporated. Using a spatula, fold in chocolate chips, hazelnuts and apple. Batter should be very thick.

Drop by spoonfuls onto an ungreased baking sheet about 2 inches apart. Bake until cookies are light brown, about 12 to 14 minutes. Remove cookies from baking sheet and let cool on a wire rack.